package cn.lzx.controller;

import cn.lzx.domain.User;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping("/order")
public class OrderController {
    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/getById/{id}")
    @HystrixCommand(fallbackMethod = "fallbackMethod") // 标记方法熔断，fallbackMethod指定的是托底方法名称
    // 当远程服务调用出现异常，或是方法本身出现异常，会触发托底方法
    public User getById(@PathVariable("id") Long id){
       // String url = "http://localhost:10020/user/getById"+id;
        String url = "http://user-service/user/getById"+id;
        User user = restTemplate.getForObject(url, User.class);
        return user;
    }

    // 降级方法，参数和返回值必须和被熔断的方法一致 ，方法名要和fallbackMethod的值一致
    public User fallbackMethod(@PathVariable("id") Long id){
        return new User(-1l, "服务熔断触发", "用户服务不可用！");
    }


}
